The ASAS-SN catalogue of variable stars VI: an all-sky sample of delta Scuti stars
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421814" target="_blank" >RIV/00216208:11320/20:10421814 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1sgKMCCyV-" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1sgKMCCyV-</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/staa499" target="_blank" >10.1093/mnras/staa499</a>
Alternative languages
Result language
angličtina
Original language name
The ASAS-SN catalogue of variable stars VI: an all-sky sample of delta Scuti stars
Original language description
We characterize an all-sky catalogue of similar to 8400 delta Scuti variables in ASAS-SN, which includes similar to 3300 new discoveries. Using distances from Gaia DR2, we derive period-luminosity relationships for both the fundamental mode and overtone pulsators in the W-JK, V, Gaia DR2 G, J, H, K-s, and W-1 bands. We find that the overtone pulsators have a dominant overtone mode, with many sources pulsating in the second overtone or higher order modes. The fundamental mode pulsators have metallicity-dependent periods, with log(10)(P) similar to -1.1 for [Fe/H] < -0.3 and log(10)(P) similar to -0.9 for [Fe/H] > 0, which leads to a period-dependent scale height. Stars with P > 0.100d are predominantly located close to the Galactic disc (vertical bar Z vertical bar < 0.5 kpc). The median period at a scale height of Z similar to 0 kpc also increases with the Galactocentric radius R, from log(10)(P) similar to -0.94 for sources with R > 9 kpc to log(10)(P) similar to -0.85 for sources with R < 7 kpc, which is indicative of a radial metallicity gradient. To illustrate potential applications of this all-sky catalogue, we obtained 30 min cadence, image subtraction TESS light curves for a sample of 10 fundamental mode and 10 overtone delta Scuti stars discovered by ASAS-SN. From this sample, we identified two new delta Scuti eclipsing binaries, ASASSN-V J071855.62-434247.3 and ASASSN-V J170344.20-615941.2 with short orbital periods of P-orb = 2.6096 and 2.5347 d, respectively.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/LTAUSA18093" target="_blank" >LTAUSA18093: Time-variability in astronomy: participation in project All-Sky Automated Survey for Supernovae</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
493
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
23
Pages from-to
4186-4208
UT code for WoS article
000526035600081
EID of the result in the Scopus database
2-s2.0-85085386618